Steam-boiler.



PATENTED JUNE 4, 1907.

E. E. CARR..

STEAM BOILBR.

APPLICATION FILED SEPT. 10.1906.

2 SHEETS-SHEET 14 mami PATENTED JUNE 4, 1907.

E. E. CARR. STEAM BOILER. APPLIOATION FILED sEPT.1o. 190e.

2 SHEETS-SHEET Z.

ELMER E. CARR, OF CHICAGO, ILLINOIS.

STEANFBOILER.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed September 10, 1966. Serial No. 3341023.

To all whoml it may concern:

Be it known that I, ELMER E. CARR, a citizen of the United States, and aresident of Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Steam-Boilers, of whichthe following is a specification, and which are illustrated in theaccompanying drawings, forming a part thereof.

This invention relates to what are known as water-tube boilers, in whichthe furnace heat is directed rimarily uion a series of tubes connectingleaders an through which the water is circulated.

The objects of the invention are to simplify the construction of theboiler and to increase its efficiency by making its interiorconveniently accessible for cleaning by providing for a freercirculation of water; by providing for the agitation of the water in theupper or steam drum, whereby the liberation of the steam is facilitated;and by providing for the better heating of the steam drum than hasheretofore been practical.

The invention is eXem liiied by the structure hereinafter describe andwhich is illustrated in the accompanying drawings, in which- Figure 1 isa sectional detail of the boiler and its settings; Fig. 2 is a detailsection on the line 2--2 of Fig. 1; Fig. 3 is an enlarged detail showingthe front of the boiler, partly in section and artly in elevation; andFig. 4 is a sectional etail of the mud or sediment drum.

As the form of fire-box and grate used in connection with the boiler isentirely immaterial, this detail is not shown in the drawings exceptthat at 10 is represented a furnace bridge wall, the line of draft beingcontrolled by baffle plates 11-and 12, and a smoke flue being shown at13.

The boiler consists of a plurality of drums, preferably cylindrical inform, there being shown two, designated 14 and 15, at the rear andadjacent to and just inside of the back wall 16 of the furnace; two,designated 17, 18, of the same form, located at'the front of the furnaceand adjacent to and inside of its front wall 19, and being at somewhatgreater elevation than the rear drums; and an up er drum 20 arrangedlongitudinally of the fp nace and located adjacent to but inside of itsdome 21. Each of the rear drums 14, 15, is connected with one of theforward drums 17, 1S, by a plurality of tubes, as shown at 22,

23, which are, of course, inclined upwardly from rear to front.

A water leg 24 leads domi from each side of .the drum 20, and adjacentits bottom, to the drum 15. A hollow saddle 25 affords communicationbetween tliedrums 14 and 15, and a similar saddle 26 connects the drums17 and 18. The arts 24, 25 and 26 are preferably each provi( ed induplic ate, only one of each of these parts being shown in the drawings.A water leg- 27 (only one of which is shown) leads from the drum 18m-oeach side' of the drum 20, entering it near its bottom. Water isadmitted to the boiler through a connectioi 28, and steam is deliveredfrom the boiler hrough the connections 29 and 30 leading out of the to iof the drum 20.

Each of the lower rums 14, 17, is provided with a manhole, suitablycovered, as shown at 31, 32, in one or both of its ends, of such sizethat a man may enter the drum, and the saddles 25, 26, are of such sizethat a man may pass from the lower drum of each pair into the upper one.'By this arrangement the necessity for locating hand holes in the drumopposite the end of each ofthe Water tubes 22, 23, is entirely obviated;the drums are rendered much stronger by this Jfreedom from perforations,and the cleaning operation is greatly simplified and can be performed inmuch less time than when it is necessary to remove and replace numeroushand holes covers. Furthermore, the hollow saddles 25, 26, provide for amuch freer circulation of water than has heretofore been obtained inboilers of this type, as their cross-sectional area is ample to permitthe passage of water as may be conveyed through the tubes 22.

The water legs 24, 27, are also made large enough to convey as muchwater as will the two sets of tubes 22, 23. to provide as large across-sectional area in the vertical tubes as in the inclined tubes 22,23,

vfor the reason that the water will pass much more readlly and wlth lessfriction through the large verticalfpipes than through the small andapproximatelyihorizontal tubes, this feature'of the invention involvingthe use of tubes'and water passages so proportioned that, in view oftheir position,.they

will have substantially equal conveying capacity.

The upper drum 20 is provided with a suitably-closed man-hole 33 in oneorI both of its ends. A series of baffle plates 34 is-locatedtransversely across the interior of the drum It is not necessary v IIOl20, rising from its bottom, these plates being inclined backwardly withreference to the direction of circulation of the water and beingapertured adjacent their lower edges, as shown at 35.

The direction vof circulation is upwardly from the drums 14, 15, throughthe tubes 22, 23, the drum 17, the saddle 26, the drum 18, and -thewater legs 27;l itis thence backwardly through the drum 20, anddownwardly through the water legs 24 to the drums 15, saddle 25 anddrum14. As the water moves backwardly through the drum 20 it is agitatedby itscontact with the baffle plates 34, and these plates serve thefurther purpose of directing it down to the bottom of this drum andhence bringing it into contact with the greatest available' heat. Thisagitation of vthe water facilitates the separation of the steamglobules. The pitch ofthe baille plates may be determined by the builderin view of the general situation of the boiler.

The location ofthe steam drum within and beneath the dome 21 of thefurnace provides for the circulation of the hot vapors entirely aroundit, and secures a drier steam than when the steam chamber is locatedpractically outside of the furnace chamber.

Channels are formed on the inner surfaces of the side Walls 36 of theboiler, as shownat 37, leading downwardly from its dome 21 to ermit ofthe insertion of steam pipes 3S havlng lateral perforations, `as shownat 39, so arranged as to discharge jets of steam upon the exteriors ofthe tubes 22, 23, for the purpose of blowing oil the dust which mayaccumulate upon them. The channels 37 are inclined in order that thesteam pipe may besubstantially perpendicular to the tubes 22, 23,thereby provlding for the more eHicient sweeping of the tubes 22, 23, bythe steam jets. The pipes 38 maybe withdrawn from the channels 37 whennot in use, and in order that they may be turned to direct steam upondill'erent portions of the boiler ,tubes they will preferably have aiexible connection (not shown) with the steam supply.

The drum 14 being the lowest section of the boiler, will receive theaccumulation of sediment. A blow-oil" pipe 40 is located Within thisdrum and extends longitudinally thereof for substantially its entirelength.

As shown, it projects through the wall ofthe drum at one of its ends,and is there provided with a valve controlled nipple 41. This pipe isfreely perforated throughout that portion` of its length which lieswithin the drum, as shown at 42, these perforations being preferablyconned to its lower side. I/Vhen the nipple 41 is open the internalpressure of the boiler will forcethe mud or the sediment into. the pipe40 and vthence deliver it from the boiler. This arrangement of theblow-of`r` or sediment pipe insures the removal of the hollow saddbackwardly with reference sediment from the entire floor of the muddrum,a common fault with devices heretofore used for this purpose being thatthe sediment is removed only from that portion of the drum adjacent thedischarge nipple.

The boiler thus described provides a further advantage in that its frontWall 19 may be freed from perforations, except to accomv 1. Incombination, two pairsv of drums, i

the members of each pair being vertically alined, water tubes connectingthe pairs of drums, one of said drums having a man hole and itscompanion being joined to it by a e adapted toal'ord access for cleaningpurposes frein one drum to the other.

2. In combination, in a steam boiler, drums united by inc-lined watertubes, a steam drum, water legs connecting the steam drum with the firstnamed drums, and bale plates crossing the lower portion of the steamdrum between the water legs.

3. In combination, in a steam boiler, drums united by inclined watertubes, a steam drum, water legs connecting the steam drum with thefirst-named drums, balle plates .crossing the lower portion of the steamdrum between the water legs and being inclined to the direction of flowof water.

IOO

4. In combination, in a steam boiler, drums l united by inclined watertubes, a steam drum, water legs connecting the steam drum with thefirst-named drums, and apertured baie plates crossing the lower portionof the steam drum between the water le s and being inclined backwardlywith re erence to the direction of flow of water.

5. In a steam boiler, in combination, a setting havin a discharge flueand containin a iire box, ue passages, and a dome in t e form of aself-supporting arch, its chamber being above but open to the mainchamber of the setting and being independent of the iiue passages anddischarge flue and a steam drum located within the dome and spaced apartfrom the walls thereof, whereby a dead-vapor space is provided around.the drum. j f

6. In asteam boiler, in combination, two sets of drums spaced aparthorizontally and vertically, the drums of each set being verticallyalined connection between the drums IIO of eachy set, tubes connectingthe sets of drums, a steam drum, and a water leg connecting each of thefirst-named sets of drums with the steam drum.

7. In a steam boiler, in combination, two l alined cylindrical Waterdriinis arranged besetsof driinis spaced apa-rt horizontally and low thesteain drinn, each of'siieli driiins having its axis extendingtransverse to the axis of the steam drinn and the two sets of driinisvertically, the drums of each set. being vertically alined connectionbetween the driinis of each set, tiibes connecting the sets of drums, ast-eain drinn,` and a water leg conneetin, r each of the first-namedsets of drums with the steani drinn, the water legs having substantiallythe saine carrying capacity as the inclined tubes.

8. In a steam boiler, in combination, a. cy-

being spaced apart horizontalliv and vertijeally, tubes connecting thesets of water lindrica-l steam drinn, a plurality of cylinl drical waterdrains below the steani drinn, the wat-er (lriinzs being spacedaparthorizonextending transverse to the axis of the st.eain drinn, tubesconnecting the water drums, and water legs connect-ing the water driiinswith the steam drinn.

9. Ina steam boiler, in combination, a eylindrioal steam drinn, two setsof verticallydrums, :i hollow saddle connectinzgr the water drums ofeach set, and a water leg connecting tlie izpperinost drinn ot' each setwith the steam driiip.

1t). In a steam boiler7 in combination, two sets of driinis spaced aparthorizontally and 1 vertically, connection between the driiins of i eachset., tubes connectingr the sets of drums, tally and vertically and eachhaving its axis a stea-in drum, and awatei' leg; connecting y each ofthe iirst-nanied sets of driiins with the steam drain.

ELMER E. CARR.

Witnesses:

Loiis K. GiLLsoN, CHARLES B. GiLLsoN.

